Yup, it exists...but as the previous posts mention, it is VERY expensive,
and has to be used in conjunction with regular fingersticks -- not instead
of. My own case manager was trying to get me one, but we researched it &
found out it was rather pointless for me. If you have real problems with
frequent highs or lows, it *might* be helpful...but I think it is too
cost-prohibitive & maintenance-intensive.

~Eri